JP2014102473A - Image forming apparatus and toner container - Google Patents

Abstract

[PROBLEMS] To prevent contamination of a user's body and a surrounding floor by toner adhering to a communication port of a support member.
An image forming apparatus according to the present invention includes a container main body 20 provided with a discharge port 42, a toner container 9 having a shutter mechanism 21 that opens and closes the discharge port 42, and a mounting in which the toner container 9 is attached and detached. The shutter mechanism 21 has a support member 43 provided with a communication port 48 communicating with the discharge port 42, and a closing posture in which the discharge port 42 and the communication port 48 are closed with the toner container 9 removed. A first shutter member 44 that takes an open posture in which the discharge port 42 and the communication port 48 are opened with the toner container 9 mounted, and an edge of the communication port 48 in the mounting direction rear side with the toner container 9 removed. And a second shutter member 45 taking an exposure posture in which the edge of the communication port 48 in the mounting direction is exposed with the toner container 9 mounted. To.
[Selection] Figure 6

Description

  The present invention relates to an image forming apparatus and a toner container provided in the image forming apparatus.

  2. Description of the Related Art Conventionally, in an electrophotographic image forming apparatus, development processing is performed by supplying toner from a developing unit to an electrostatic latent image formed on the surface of a photosensitive drum or the like. The toner used for such development processing is supplied from the toner container to the developing device. The toner container is detachably attached to a mounting member (for example, the apparatus main body) provided in the image forming apparatus so that the toner container can be replaced when the internal toner is used up.

  The toner container usually includes a container body provided with a discharge port for discharging the toner, and a shutter mechanism for opening and closing the discharge port. For example, Patent Document 1 discloses a shutter including a support member (see “casing 60”) disposed outside the container body and a shutter member (see “shutter member 50”) supported by the support member. A mechanism is disclosed. In this prior art, a communication port (see “notch window 621”) communicating with the discharge port of the container body is provided in the support member, and the communication port can be opened and closed by the shutter member. Yes.

JP 2008-112198 A

  However, when the configuration as described above is adopted, the toner discharged from the discharge port of the container body adheres to the communication port of the support member. When the toner container is replaced, the toner attached to the communication port of the support member may contaminate the user's body or the surrounding floor.

  In view of the above circumstances, an object of the present invention is to prevent the user's body and surrounding floor from being contaminated by toner adhering to the communication port of the support member.

  An image forming apparatus according to the present invention includes a toner container having a container body provided with a discharge port for discharging toner, a shutter mechanism for opening and closing the discharge port, and the toner container being attached and detached along a predetermined mounting direction. A mounting member, wherein the shutter mechanism is disposed outside the container main body, and is provided with a support member provided with a communication port communicating with the discharge port, and the toner container is removed from the mounting member A first shutter member that takes a closing posture to close the discharge port and the communication port, and takes an open posture to open the discharge port and the communication port while the toner container is mounted on the mounting member; and the toner In a state in which the container is removed from the mounting member, the cover port is covered from the outside in a state of covering the edge of the communication port in the mounting direction, and the toner container is mounted on the mounting member. A second shutter member to take an exposure position to expose the mounting direction rear side of the edge of Killen communication port, characterized in that it comprises.

  By adopting such a configuration, when the toner container is removed from the mounting member, the edge on the far side in the mounting direction where the toner is most likely to adhere is communicated from the outside by the second shutter member. It becomes possible to cover. Accordingly, when the user replaces the toner container, it is possible to prevent the user's body and the surrounding floor from being contaminated by the toner adhering to the communication port of the support member.

  The second shutter member may be shorter in the mounting direction than the first shutter member.

  By adopting such a configuration, the second shutter member can be downsized as compared with the case where the length in the mounting direction of the second shutter member is longer than the length in the mounting direction of the first shutter member. It becomes possible. Along with this, material costs can be reduced.

  The first shutter member is disposed outside the container body and inside the support member, and is supported by the support member so as to be movable along the mounting direction. The second shutter member is supported by the support member. It may be arranged outside the member and supported by the support member so as to be movable along the mounting direction.

  By adopting such a configuration, the first shutter member and the second shutter member can be moved along the mounting direction with a simple configuration, and the postures of the first shutter member and the second shutter member can be switched. .

  The outer surface of the support member is provided with a fitting portion, and the inner surface of the second shutter member is fitted to fit the fitting portion in a state where the second shutter member is in the covering posture. A joint may be provided.

  By adopting such a configuration, it is possible to reliably prevent the second shutter member from being inadvertently switched from the covering posture to the exposing posture when the toner container is replaced. As a result, it is possible to more reliably prevent the user's body and the surrounding floor from being contaminated by the toner adhering to the communication port.

  A first contact protrusion is provided on the outer surface of the first shutter member, and a second contact protrusion is provided on the outer surface of the second shutter member on the rear side in the mounting direction with respect to the first contact protrusion. A contact piece is provided on the inner surface of the mounting member, and when the toner container is mounted on the mounting member, the second contact projection contacts the contact piece and the second shutter The member may be switched from the covering position to the exposing position, the first contact protrusion may be in contact with the second contact protrusion, and the first shutter member may be switched from the closed position to the open position.

  By adopting such a configuration, the first shutter member can be easily switched from the closed position to the open position in conjunction with the mounting of the toner container on the mounting member, and the second shutter member can be switched from the covering position. It can be easily switched to the exposure posture.

  The inner surface of the mounting member is provided with a locking piece that can be deformed to the side away from the toner container, and the outer surface of the support member is provided with a mounting portion that can press the locking piece. (2) A locking projection that is locked by the locking piece is provided on the outer surface of the shutter member. When the toner container is removed from the mounting member, the locking protrusion is locked by the locking piece. Then, the second shutter member is switched from the exposed posture to the covering posture, the mount portion presses the locking piece, and the locking piece is deformed to the side away from the toner container. The locking projections may be unlocked.

  By adopting such a configuration, the second shutter member can be easily switched from the exposed posture to the covering posture in conjunction with the removal of the toner container from the mounting member.

  The toner container of the present invention has a container body provided with a discharge port for discharging toner, and a shutter mechanism for opening and closing the discharge port, and is attached to a mounting member provided in the image forming apparatus in a predetermined mounting direction. A toner container that is attached and detached along the surface, wherein the shutter mechanism is disposed outside the container body, and is provided with a support member provided with a communication port that communicates with the discharge port, and the toner container is detached from the mounting member. A first shutter member that takes a closed posture to close the discharge port and the communication port in a closed state and takes an open posture to open the discharge port and the communication port with the toner container mounted on the mounting member; In a state where the toner container is removed from the mounting member, a cover posture is taken so as to cover the edge of the communication port on the back side in the mounting direction from the outside, and the toner container is mounted on the mounting member. In which it characterized in that it comprises a second shutter member to take an exposure position to expose the mounting direction rear side of the edge of the communication port.

  By adopting such a configuration, when the toner container is removed from the mounting member, the edge on the far side in the mounting direction where the toner is most likely to adhere is communicated from the outside by the second shutter member. It becomes possible to cover. Accordingly, when the user replaces the toner container, it is possible to prevent the user's body and the surrounding floor from being contaminated by the toner adhering to the communication port of the support member.

  According to the present invention, it is possible to prevent the user's body and the surrounding floor from being contaminated by toner adhering to the communication port of the support member.

1 is a schematic diagram illustrating an outline of a printer according to an embodiment of the present invention. FIG. 6 is a perspective view illustrating a state in the middle of mounting the toner cartridge on the mounting member in the printer according to the embodiment of the invention. FIG. 4 is a perspective view illustrating a state in which the toner cartridge is mounted on the mounting member in the printer according to the embodiment of the invention. FIG. 3 is a perspective view from the lower rear side showing the toner cartridge in the printer according to the embodiment of the present disclosure. FIG. 3 is a perspective view from the front upper side showing the toner cartridge in the printer according to the embodiment of the present invention. FIG. 4 is an exploded perspective view showing a shutter mechanism in the toner cartridge of the printer according to the embodiment of the present invention. FIG. 5 is a perspective view illustrating a shutter mechanism in the toner cartridge of the printer according to the embodiment of the invention. FIG. 4 is a perspective view showing a front side portion of a support frame in the mounting member of the printer according to the embodiment of the present invention. In the toner cartridge of the printer according to the embodiment of the present invention, (a) is a cross-sectional view showing a state in which the first shutter member is in a closed posture and the second shutter member is in a covering posture, (b) ) Is a cross-sectional view showing a state in which the first shutter member takes a closed posture and the second shutter member takes an exposed posture, and (c) shows a second shutter while the first shutter member takes an open posture. It is sectional drawing which shows the state which the member has taken the exposure attitude | position. In the printer according to the embodiment of the present invention, (a1) is a bottom view showing a state where a hook is engaged with a hook hole, and (a2) is a side view of the same. (B1) is a bottom view showing a state where the engagement of the hook with the hook hole is released and the arm portion of the lock piece is elastically deformed upward, and (b2) is a side view of the same. (C1) is a bottom view showing a state in which the engagement of the hook with the hook hole is released and the arm portion of the lock piece is elastically deformed to the right, and (c2) is a side view thereof. In the printer which concerns on one Embodiment of this invention, it is a perspective view which shows the state which the 1st shutter member takes a closed attitude | position and the 2nd shutter member has taken the cover attitude | position. In the printer which concerns on one Embodiment of this invention, it is a perspective view which shows the state which the 1st shutter member takes a closed attitude | position and the 2nd shutter member has taken the exposure attitude | position. FIG. 5 is a perspective view illustrating a state in which the first shutter member is in an open posture and the second shutter member is in an exposed posture in a printer according to an embodiment of the present invention. In the printer according to the embodiment of the present invention, (a) is a bottom view showing a state in which the stopper protrusion is locked by the stopper piece, and (b) is a side view of the same. FIG. 4 is a schematic diagram illustrating a relationship between a locking protrusion, a mount portion, and a locking piece when a toner cartridge is removed from a mounting member in a printer according to an embodiment of the present invention.

  First, the overall configuration of a printer 1 as an image forming apparatus will be described with reference to FIG. FIG. 1 is a schematic diagram showing an outline of a printer according to an embodiment of the present invention.

  The printer 1 includes a box-shaped printer main body 2, a paper feed cassette 3 for storing paper (not shown) is provided at the bottom of the printer main body 2, and a paper discharge tray is provided at the upper end of the printer main body 2. 4 is provided.

  An exposure unit 5 composed of a laser scanning unit (LSU) is disposed on the left side of the printer body 2. An image forming unit 6 is provided on the right side of the printer main body 2. The image forming unit 6 is rotatably provided with a photosensitive drum 7 that is an image carrier. Around the photosensitive drum 7, a charger 8, a developing device 10 connected to a toner cartridge 9 as a toner container, a transfer roller 11, and a cleaning device 12 are arranged in the rotational direction of the photosensitive drum 7 (see FIG. 1 (see arrow X). The developing device 10 contains a developer (a one-component developer composed only of toner or a two-component developer composed of toner and carrier; hereinafter referred to as “toner”).

  A paper transport path 13 is provided on the right side of the printer body 2 from below to above. A paper feed unit 14 is provided at the upstream end of the conveyance path 13, and a transfer unit 15 configured by the photosensitive drum 7 and the transfer roller 11 is provided at a middle portion of the conveyance path 13, and a downstream part of the conveyance path 13. Is provided with a fixing device 16. A reversing path 17 for double-sided printing is provided on the right side of the transport path 13.

  Next, an image forming operation of the printer 1 having such a configuration will be described.

  When the printer 1 is turned on, various parameters are initialized, and initial setting such as temperature setting of the fixing device 16 is executed. Then, when image data is input from a computer or the like connected to the printer 1 and an instruction to start printing is given, an image forming operation is executed as follows.

  First, after the surface of the photosensitive drum 7 is charged by the charger 8, exposure corresponding to image data is performed on the photosensitive drum 7 by laser light from the exposure device 5 (see arrow P in FIG. 1). Then, an electrostatic latent image is formed on the surface of the photosensitive drum 7. Next, the developing device 10 develops the electrostatic latent image into a toner image with the toner supplied from the toner cartridge 9.

  On the other hand, the sheet taken out from the sheet cassette 3 by the sheet feeding unit 14 is conveyed to the transfer unit 15 in synchronization with the above-described image forming operation, and the toner image on the photosensitive drum 7 is transferred to the sheet by the transfer unit 15. Is transcribed. The sheet on which the toner image has been transferred is conveyed downstream in the conveyance path 13 and enters the fixing device 16 where the toner image is fixed on the sheet. The sheet on which the toner image is fixed is discharged from the downstream end of the transport path 13 to the discharge tray 4. The toner remaining on the photosensitive drum 7 is collected by the cleaning device 12.

  Next, the toner cartridge 9 will be described in detail. Note that arrows Fr, Rr, L, and R attached to the drawings after FIG. 2 indicate the front side, the rear side, the left side, and the right side of the toner cartridge 9, respectively.

  As shown in FIGS. 2 and 3, the toner cartridge 9 is attached to and detached from the mounting member 18 (details will be described later) along the front-rear direction. That is, in the present embodiment, the front-rear direction is the mounting direction of the toner cartridge 9 to the mounting member 18. In this embodiment, the front side is the front side in the mounting direction of the toner cartridge 9 to the mounting member 18, and the rear side is the back side in the mounting direction of the toner cartridge 9 to the mounting member 18. Hereinafter, the simple “mounting direction” refers to the mounting direction of the toner cartridge 9 to the mounting member 18.

  As shown in FIG. 4, the toner cartridge 9 includes a box-shaped container main body 20 having an open upper surface, a shutter mechanism 21 disposed at the lower right of the front end of the container main body 20, and a right side of the container main body 20. The conveyance screw 22 accommodated in the lower part, the stirring paddle 23 accommodated in the approximate center of the container main body 20, and the lid 24 covering the upper surface of the container main body 20 are provided. Hereinafter, these will be described in order.

  First, the container body 20 will be described. The container body 20 has a long shape in the front-rear direction. A main body side flange portion 25 is provided on the outer periphery of the upper end of the container main body 20. A pair of left and right mounting protrusions 27 are provided at the lower end of the rear end wall 26 of the container body 20.

  As shown in FIG. 5, a filling port 30 for filling toner into the container body 20 is provided on the right side of the front end wall 28 of the container body 20. The filling port 30 is closed by a cap 31. A bearing portion 32 is provided below the filling port 30 in the lower right portion of the front end wall 28 of the container body 20. A handle 33 projects from the left side of the front end wall 28 of the container body 20 toward the front.

  As shown in FIG. 4, a fixed frame 35 projects from the front end portion to the rear end portion at the center portion of the bottom wall 34 of the container body 20. As shown in FIG. 6, a plurality of (for example, three) fixed window portions 37 are provided on the front end side of the right side portion 36 of the fixed frame 35 at a predetermined interval in the front-rear direction.

  A fixing plate 38 is provided at the right front end of the bottom wall 34 of the container body 20. The fixed plate 38 has a flat plate shape that is long in the front-rear direction, and is provided substantially horizontally. The fixed plate 38 is supported by a plurality of support plates 40 provided at intervals in the front-rear direction. Fixing recesses 41 are provided at both front and rear ends of the right end portion of the fixing plate 38. A substantially rectangular discharge port 42 is provided in the center of the rear portion of the fixed plate 38. The discharge port 42 communicates with the inside of the container body 20, and the toner accommodated in the container body 20 can be discharged through the discharge port 42.

  Next, the shutter mechanism 21 will be described. The shutter mechanism 21 includes a support member 43 disposed on the lower side (outside) of the container body 20 and a first shutter member 44 disposed on the lower side (outside) of the container body 20 and on the upper side (inside) of the support member 43. And a second shutter member 45 disposed on the lower side (outer side) of the support member 43.

  The support member 43 has a flat plate shape that is long in the front-rear direction. A plurality of (for example, three) left-side fixing pieces 46 project leftward from the left end of the support member 43 at a predetermined interval in the front-rear direction. Right-side fixing pieces 47 project upward from both front and rear ends of the right end portion of the support member 43. Then, the left fixed pieces 46 are engaged with the fixed window portions 37 provided on the fixed frame 35 of the container body 20, and the right fixed pieces are inserted into the fixed recesses 41 provided on the fixed plate 38 of the container body 20. By engaging 47, the support member 43 is fixed to the container body 20 in a substantially horizontal posture (see FIG. 7).

  As shown in FIG. 6, a rectangular communication port 48 that is long in the front-rear direction is provided at the center of the support member 43. The communication port 48 communicates with a discharge port 42 (hereinafter referred to as “the discharge port 42 of the container body 20”) provided in the fixing plate 38 of the container body 20. On the lower surface (outer surface) of the support member 43, a fitting protrusion 50 as a fitting portion is provided on the rear side of the rear edge portion 49 (the edge portion on the rear side in the mounting direction) of the communication port 48. The fitting protrusion 50 is circular when viewed from the bottom. On both the left and right sides of the communication port 48, guide holes 51 are provided along the front-rear direction.

  On the lower surface (outer surface) of the support member 43, a mount portion 52 projects downward from the right side of the rear portion of the right guide hole 51. A first inclined portion 53 that is inclined rearward and downward is provided at the front portion of the mount portion 52, and another inclined portion 54 that is inclined forward and downward is provided at the rear portion of the mount portion 52.

  The support member 43 is provided with a hook hole 55 on the right side of the mount portion 52, and an engagement groove 56 is provided on the front side of the hook hole 55. On the further front side of the engagement groove 56, a contact surface 57 is formed along the front-rear direction.

  The first shutter member 44 includes a main body plate 58 and a lock piece 59 provided on the right front side of the main body plate 58.

  The main body plate 58 has a rectangular flat plate shape that is long in the front-rear direction, and is provided substantially horizontally. The main body plate 58 is disposed so as to be sandwiched between the fixing plate 38 of the container main body 20 and the support member 43 of the shutter mechanism 21, and is supported by the support member 43 so as to be movable in the front-rear direction. Yes. A rectangular tube-shaped first abutting protrusion 60 projects downward from the front part of the lower surface (outer surface) of the main body plate 58. The first contact protrusion 60 is inserted into the communication port 48 provided in the support member 43 in a state of being movable in the front-rear direction (see FIG. 7).

  As shown in FIG. 6, a projecting piece 61 projects downward from the lower surface of the main body plate 58 on the rear side of the first contact projection 60. The projecting piece 61 has a flat, substantially rectangular shape that is long in the front-rear direction. The projecting piece 61 is engaged with a communication port 48 provided in the support member 43 in a state of being movable in the front-rear direction (see FIG. 7). The first shutter member 44 is provided with a lead-out port 62 on the rear side of the projecting piece 61.

  As shown in FIG. 6, the lock piece 59 includes an arm portion 63 extending in the front-rear direction and a lock portion 64 provided at the rear end portion of the arm portion 63.

  A base end portion (front end portion) of the arm portion 63 is connected to a front end portion of the main body plate 58 via a connection portion 65. The arm portion 63 is elastically deformable upward and rightward with the base end side (front end side) as the center. A pressed portion 66 projects downward from the lower edge portion of the arm portion 63. The front portion of the pressed portion 66 is inclined rearward and downward, and the rear portion of the pressed portion 66 is inclined downward and forward. Therefore, the pressed part 66 has a substantially isosceles trapezoidal shape.

  A stopper protrusion 67 protrudes from the lock portion 64 toward the right side. An abutting projection 68 projects from the lock portion 64 toward the left side. A hook 70 projects from the lock portion 64 toward the rear side.

  The length of the second shutter member 45 in the front-rear direction is shorter than that of the first shutter member 44. The second shutter member 45 includes a lower wall portion 71 provided substantially horizontally, and a side wall portion 72 bent substantially perpendicularly upward from the left and right sides of the lower wall portion 71, and is substantially U-shaped. Is made. A square tube-shaped second abutting projection 73 projects downward from the front end of the lower surface (outer surface) of the lower wall portion 71. The second contact protrusion 73 is provided on the rear side (back side in the mounting direction) of the first contact protrusion 60 provided on the first shutter member 44 (see FIG. 7). On the lower surface (outer surface) of the lower wall portion 71, a rectangular cylindrical locking projection 74 is provided projecting downward from the right rear of the second contact projection 73. On the upper surface (inner surface) of the lower wall portion 71, a fitting recess 75 is provided as a fitted portion. The fitting recess 75 has a circular shape in plan view.

  As shown in FIG. 6, the upper end portion of each side wall portion 72 is bent outward, and a guide edge portion 76 is formed by the bent portion. Then, with each side wall 72 being inserted into each guide hole 51 of the support member 43, each guide edge 76 comes into contact with the upper surface of the support member 43 so that it can move along the front-rear direction. The second shutter member 45 is supported by the support member 43.

  Next, the conveying screw 22 will be described. As shown in FIG. 4, the conveying screw 22 has a shape that is long in the front-rear direction, and is disposed directly above the discharge port 42 of the container body 20. The conveying screw 22 includes a rod-shaped rotating shaft 77 and a spiral fin 78 provided concentrically on the outer periphery of the rotating shaft 77.

  The rear end portion of the rotation shaft 77 penetrates the rear end wall 26 of the container body 20 and protrudes to the rear side of the rear end wall 26, and the first driven coupling 80 is fixed to the protruding portion. The front end portion of the rotation shaft 77 is pivotally supported by a bearing portion 32 (see FIG. 5) provided on the front end wall 28 of the container body 20. With such a configuration, the conveying screw 22 can rotate with respect to the container body 20.

  Next, the stirring paddle 23 will be described. As shown in FIG. 4, the stirring paddle 23 has a long shape in the front-rear direction. The stirring paddle 23 includes a support frame 81 having a frame plate shape and a sheet-like stirring blade 82 supported by the support frame 81. The rear end portion of the support frame 81 penetrates the rear end wall 26 of the container body 20 and protrudes to the rear side of the rear end wall 26, and the second driven coupling 83 is fixed to the protruding portion. The front end portion of the support frame 81 is pivotally supported on the front end wall 28 of the container body 20. With such a configuration, the stirring paddle 23 can rotate with respect to the container body 20.

  Next, the lid body 24 will be described. As shown in FIG. 5, the lid body 24 has a rectangular shape that is long in the front-rear direction. A lid body flange portion 84 having a shape corresponding to the body side flange portion 25 of the container body 20 is provided on the outer periphery of the lid body 24, and the body side flange portion 25 and the lid body side flange portion 84 are ultrasonically welded. Thus, the container body 20 and the lid body 24 are integrated.

  Next, the mounting member 18 (see FIG. 2 etc.) to which the toner cartridge 9 configured as described above is attached and detached will be described. The mounting member 18 forms, for example, a part of the printer main body 2 or the developing device 10. As shown in FIG. 2, the mounting member 18 includes a support frame 85 extending in the front-rear direction and a drive unit 86 provided on the rear end side of the support frame 85. Hereinafter, these will be described in order.

  First, the support frame 85 will be described. The support frame 85 has a flat plate shape and is provided substantially horizontally. As shown in FIG. 3, the support frame 85 is configured to support the toner cartridge 9 from below with the toner cartridge 9 mounted on the mounting member 18. As shown in FIG. 8, a pair of left and right guide rails 87 are provided along the front-rear direction at the front portion of the upper surface of the support frame 85.

  A pedestal 88 is projected from the front of the upper surface (inner surface) of the support frame 85 to the right of the right guide rail 87. The upper surface of the base part 88 is provided substantially horizontally. A supply port 90 is provided in the center of the upper surface of the pedestal portion 88. The supply port 90 communicates with the inside of the developing device 10.

  On the front portion of the pedestal portion 88, a first inclined surface 91 that is inclined forward and downward is provided continuously with the upper surface of the pedestal portion 88. On the other hand, a contact piece 92 projects from the inclined surface 91. On the rear portion of the pedestal portion 88, the other inclined surface (not shown) that is inclined rearward and downward is provided continuously with the upper surface of the pedestal portion 88.

  A locking piece 93 is provided at the front end of the upper surface of the support frame 85 on the right side of the right guide rail 87 and in front of the pedestal portion 88. The front end portion of the locking piece 93 is supported by the front edge portion 94 of the support frame 85. The locking piece 93 can be elastically deformed downward with the front end as a fulcrum. A protrusion 95 is provided on the rear part of the locking piece 93 upward. The protrusion 95 is provided with an inclined surface portion 96 that is inclined rearward and upward.

  A base portion 97 projects from the front end portion of the upper surface of the support frame 85 on the right side of the locking piece 93. A raised portion 98 is provided on the upper surface of the base portion 97. A guide frame 100 is provided along the front-rear direction at the right end of the upper surface of the support frame 85 to the right of the base 97. A stopper piece 101 that protrudes in a substantially V shape toward the left side is provided on the front portion of the guide frame 100. The stopper piece 101 is located at the rear portion of the raised portion 98.

  Next, the drive unit 86 will be described. As shown in FIG. 2, a first drive coupling 103 is provided in the lower right portion of the front surface (inner surface) of the drive unit 86. The first drive coupling 103 is connected to a first driven coupling 80 fixed to the conveying screw 22 of the toner cartridge 9 when the toner cartridge 9 is mounted on the mounting member 18. The first drive coupling 103 is connected to a drive source (not shown) such as a motor provided in the drive unit 86. When the drive source is rotated with the toner cartridge 9 mounted on the mounting member 18, this rotation is transmitted to the transport screw 22 via the first drive coupling 103 and the first driven coupling 80, and transported. The screw 22 rotates.

  A second drive coupling 104 is provided at the center of the front surface (inner surface) of the drive unit 86. The second drive coupling 104 is connected to a second driven coupling 83 fixed to the stirring paddle 23 of the toner cartridge 9 when the toner cartridge 9 is mounted on the mounting member 18. The second drive coupling 104 is connected to the drive source (not shown). When the drive source is rotated with the toner cartridge 9 mounted on the mounting member 18, this rotation is transmitted to the stirring paddle 23 via the second drive coupling 104 and the second driven coupling 83, and the stirring is performed. The paddle 23 rotates.

  A pair of left and right mounting receivers 105 are provided in the lower part of the drive unit 86. When the toner cartridge 9 is mounted on the mounting member 18, each mounting protrusion 27 provided on the rear end wall 26 of the toner cartridge 9 is configured to engage with each mounting receiving portion 105.

  The operation of the shutter mechanism 21 when the toner cartridge 9 is mounted on the mounting member 18 will be described.

  In a state where the toner cartridge 9 is removed from the mounting member 18, as shown in FIG. 9A, the discharge port 42 of the container body 20 and the communication port 48 of the support member 43 are connected to the main body plate 58 of the first shutter member 44. Is closed. The posture of the first shutter member 44 at this time is referred to as a “closed posture”. Thus, in the state where the first shutter member 44 is in the closed position, as shown in FIGS. 10A1 and 10A2, the hook 70 of the lock piece 59 of the first shutter member 44 is supported by the support member. The engagement of the first shutter member 44 with respect to the container body 20 and the support member 43 is restricted by engaging with the hook hole 55 of 43.

  Further, when the toner cartridge 9 is detached from the mounting member 18, the second shutter member 45 moves down the rear edge 49 of the communication port 48 provided in the support member 43 as shown in FIG. It covers from the side (outside). The posture of the second shutter member 45 at this time is referred to as a “covering posture”. In this state where the second shutter member 45 is in the covering posture, the container main body 20 and the support member are fitted by fitting the fitting protrusion 50 of the support member 43 and the fitting recess 75 of the second shutter member 45 together. The movement of the second shutter member 45 relative to 43 in the front-rear direction is restricted.

  From this state, when the toner cartridge 9 is pushed back and attached to the attachment member 18, the second contact protrusion 73 of the second shutter member 45 contacts the attachment member 18 as shown in FIG. 11. Abutting on the piece 92, the movement of the second shutter member 45 to the rear side is restricted. When the toner cartridge 9 is further pushed rearward, the fitting projection 50 of the support member 43 and the fitting recess 75 of the second shutter member 45 are unfitted as shown in FIGS. 9B and 12. Thus, the second shutter member 45 exposes the rear edge 49 of the communication port 48 of the support member 43. The posture of the second shutter member 45 at this time is referred to as an “exposure posture”. When the second shutter 45 is thus exposed, the second contact protrusion 73 of the second shutter member 45 contacts the first contact protrusion 60 of the first shutter member 44 in conjunction with the exposure posture.

  When the toner cartridge 9 is further pressed to the rear side, the pressed portion 66 of the lock piece 59 of the first shutter member 44 is formed on the raised portion 98 of the mounting member 18 as shown in FIGS. 10 (b1) and 10 (b2). Is pressed, and the arm portion 63 of the lock piece 59 is elastically deformed upward. Accordingly, the engagement between the hook 70 of the lock piece 59 of the first shutter member 44 and the hook hole 55 of the support member 43 is released, and the first shutter member 44 is moved in the front-rear direction with respect to the container body 20 and the support member 43. It is possible to move to. When the pressed portion 66 of the lock piece 59 of the first shutter member 44 gets over the raised portion 98 of the mounting member 18, as shown in FIGS. 10 (c 1) and 10 (c 2), the first shutter member 44. The arm portion 63 of the lock piece 59 is elastically restored downward, the abutment protrusion 68 of the lock piece 59 abuts against the abutment surface 57 of the support member 43, and the arm portion 63 of the lock piece 59 is elastically deformed to the right side. To do.

  When the toner cartridge 9 is further pushed rearward in this state, the first shutter member 44 is connected to the discharge port 42 of the container body 20 and the communication port 48 of the support member 43 as shown in FIG. 9C and FIG. Is released. The posture of the first shutter member 44 at this time is referred to as “open posture”.

  When the mounting of the toner cartridge 9 to the mounting member 18 is completed in this way, the container body 20 is connected via the discharge port 42 of the container body 20, the outlet port 62 of the first shutter member 44, and the communication port 48 of the support member 43. The inside and outside communicate with each other. As a result, the toner accommodated in the container body 20 can be supplied to the developing device 10 via the supply port 90 of the mounting member 18.

  Next, the operation of the shutter mechanism 21 when the toner cartridge 9 is detached from the mounting member 18 in the configuration as described above will be described.

  In a state where the toner cartridge 9 is mounted on the mounting member 18, the abutting protrusion 68 of the lock piece 59 of the first shutter member 44 is protruded from the support member 43 as shown in FIGS. 10 (c 1) and 10 (c 2). The arm portion 63 of the lock piece 59 is elastically deformed to the right side in contact with the contact surface 57. In this state, when the toner cartridge 9 is removed from the mounting member 18 while being pulled out to the front side, as shown in FIG. 14, the stopper protrusion 101 of the lock piece 59 of the first shutter member 44 is formed on the stopper piece 101 of the mounting member 18. Is locked, and movement of the first shutter member 44 to the front side is restricted. When the toner cartridge 9 is further pulled out in this state, the first shutter member 44 is switched from the open position to the closed position (see FIG. 12).

  When the toner cartridge 9 is further pulled out to the front side, the locking projection 74 of the second shutter member 45 is locked to the locking piece 93 of the mounting member 18 as shown in FIG. The movement of the second shutter member 45 to the front side is restricted. In this state, when the toner cartridge 9 is further pulled out to the front side, the second shutter member 45 is switched from the exposure posture to the cover posture (see FIG. 11).

  Further, as shown in FIG. 15A, the support member 43 is interlocked with the engagement of the engagement protrusion 74 of the second shutter member 45 with the engagement piece 93 of the mounting member 18 as described above. The front inclined portion 53 of the mounting portion 52 abuts on the locking piece 93. Then, when the toner cartridge 9 is further pulled out to the front side, as shown in FIG. 15B, the front inclined portion 53 of the mount portion 52 presses the locking piece 93 and the locking piece 93 is positioned on the lower side ( It is elastically deformed to the side away from the toner cartridge 9.

  Then, when the second shutter member 45 is switched from the exposed posture to the covering posture, the locking piece 93 is further elastically deformed downward as shown in FIG. 74 is released. When the toner cartridge 9 is further pulled out to the front side, the pressing of the locking piece 93 by the mount portion 52 is released as shown in FIG. Thereby, the locking piece 93 is elastically returned upward.

  In this embodiment, as described above, the rear edge portion 49 (the edge portion on the rear side in the mounting direction) where the toner is most likely to adhere among the communication ports 48 of the support member 43 is covered from the outside by the second shutter member 45. Is possible. Therefore, when the user replaces the toner cartridge 9, it is possible to prevent the user's body and the surrounding floor from being contaminated by the toner attached to the communication port 48 of the support member 43.

  Further, since the length of the second shutter member 45 in the front-rear direction (mounting direction) is shorter than the length of the first shutter member 44 in the front-rear direction, the length of the second shutter member 45 in the front-rear direction is set to the first shutter member 44. The second shutter member 45 can be downsized as compared with the case where the length is longer than the length in the front-rear direction. Along with this, material costs can be reduced.

  The first shutter member 44 and the second shutter member 45 are supported by the support member 43 so as to be movable in the front-rear direction (mounting direction). Therefore, the first shutter member 44 and the second shutter member 45 can be moved along the front-rear direction with a simple configuration, and the postures of the first shutter member 44 and the second shutter member 45 can be switched.

  Further, the fitting protrusion 50 of the support member 43 and the fitting recess 75 of the second shutter member 45 are fitted in a state where the second shutter member 45 is in the covering posture. By adopting such a configuration, it is possible to reliably prevent the second shutter member 45 from being inadvertently switched from the covering posture to the exposing posture when the toner cartridge 9 is replaced. As a result, it is possible to more reliably prevent the user's body and the surrounding floor from being contaminated by the toner adhering to the communication port 48 of the support member 43.

  When the toner cartridge 9 is mounted on the mounting member 18, the second contact protrusion 73 of the second shutter member 45 contacts the contact piece 92 of the mounting member 18 so that the second shutter member 45 is covered. The exposure posture is switched, and the first contact protrusion 60 of the first shutter member 44 is in contact with the second contact protrusion 73 of the second shutter member 45 so that the first shutter member 44 is switched from the closed posture to the open posture. Has been. By adopting such a configuration, the first shutter member 44 can be easily switched from the closed posture to the open posture in conjunction with the mounting of the toner cartridge 9 to the mounting member 18, and the second shutter member 45. Can be easily switched from the covering posture to the exposing posture.

  Further, when the toner cartridge 9 is removed from the mounting member 18, the locking projection 74 of the second shutter member 45 is locked to the locking piece 93 of the mounting member 18, and the second shutter member 45 is covered from the exposed position. It is comprised so that it may switch to. Further, the mounting portion 52 of the support member 43 presses the locking piece 93 of the mounting member 18, and the locking piece 93 is deformed downward (side away from the toner cartridge 9). 74 is configured to be unlocked. By adopting such a configuration, the second shutter member 45 can be easily switched from the exposed posture to the covering posture in conjunction with the removal of the toner cartridge 9 from the mounting member 18.

  When the toner cartridge 9 is mounted on the mounting member 18, the first shutter member 44 is switched from the closed position to the open position after the second shutter member 45 is switched from the cover position to the exposed position. On the other hand, when the toner cartridge 9 is removed from the mounting member 18, the first shutter member 44 is switched from the open position to the closed position, and then the second shutter member 45 is switched from the exposed position to the covering position. By adopting such a configuration, it is possible to more reliably prevent the user's body and the surrounding floor from being contaminated by the toner adhering to the communication port 48.

  In the present embodiment, the case where the sliding shutter that moves linearly is used as the first shutter member 44 and the second shutter member 45 has been described. On the other hand, in other different embodiments, a rotary shutter may be used as the first shutter member 44 and the second shutter member 45.

  In the present embodiment, the case where the first shutter member 44 and the second shutter member 45 are supported by the support member 43 has been described. However, in another different embodiment, the first shutter member 44 and the second shutter are separated by the container body 20. Either one or both of the members 45 may be supported.

  In the present embodiment, the configuration of the present invention is applied to the toner cartridge 9, but in another different embodiment, the toner container 9 (so-called “intermediate hopper”) interposed between the toner cartridge 9 and the developing device 10 You may apply the structure of invention.

  In the present embodiment, the case where the configuration of the present invention is applied to the printer 1 has been described. However, in another different embodiment, the configuration of the present invention is applied to other image forming apparatuses such as a copying machine, a facsimile, and a multifunction peripheral. May be.

1 Printer (image forming device)
9 Toner cartridge (toner container)
DESCRIPTION OF SYMBOLS 18 Mounting member 20 Container main body 21 Shutter mechanism 42 Ejection port 43 Support member 44 1st shutter member 45 2nd shutter member 48 Communication port 49 Rear edge part (edge part of mounting direction back side)
50 Fitting protrusion (fitting part)
52 Mount part 60 1st contact protrusion 73 2nd contact protrusion 74 Locking protrusion 75 Fitting recessed part (fitting part)
92 Contact piece 93 Locking piece

Claims (7)

A toner container having a container body provided with a discharge port for discharging toner, and a shutter mechanism for opening and closing the discharge port;
A mounting member to which the toner container is attached and detached along a predetermined mounting direction,
The shutter mechanism is
A support member disposed outside the container body and provided with a communication port communicating with the discharge port;
The toner container is removed from the mounting member, and the discharge port and the communication port are closed, and the toner container is mounted on the mounting member and the discharge port and the communication port are opened. A first shutter member that takes a posture;
In a state in which the toner container is removed from the mounting member, the communication port is covered so as to cover an outer edge of the communication port on the inner side in the mounting direction. An image forming apparatus comprising: a second shutter member having an exposure posture that exposes an edge on the back side in the mounting direction.   The image forming apparatus according to claim 1, wherein the second shutter member has a shorter length in the mounting direction than the first shutter member. The first shutter member is disposed outside the container body and inside the support member, and is supported by the support member so as to be movable along the mounting direction.
3. The image according to claim 1, wherein the second shutter member is disposed outside the support member and is supported by the support member so as to be movable along the mounting direction. 4. Forming equipment. A fitting portion is provided on the outer surface of the support member,
The fitting part which fits with the said fitting part in the state which this 2nd shutter member has taken the said cover attitude | position is provided in the inner surface of the said 2nd shutter member, The 3rd aspect is characterized by the above-mentioned. The image forming apparatus described in 1. A first contact protrusion is provided on the outer surface of the first shutter member,
A second contact protrusion is provided on the outer surface of the second shutter member on the back side in the mounting direction with respect to the first contact protrusion.
A contact piece is provided on the inner surface of the mounting member,
When the toner container is mounted on the mounting member, the second contact protrusion contacts the contact piece, and the second shutter member switches from the cover position to the exposure position, and the first contact 5. The image forming apparatus according to claim 1, wherein a protrusion contacts the second contact protrusion and the first shutter member is switched from the closed position to the open position. The inner surface of the mounting member is provided with a locking piece that can be deformed on the side away from the toner container,
On the outer surface of the support member, a mount portion capable of pressing the locking piece is provided,
The outer surface of the second shutter member is provided with a locking projection that is locked by the locking piece,
When the toner container is removed from the mounting member, the locking projection is locked to the locking piece, the second shutter member is switched from the exposed position to the covering position, and the mount portion is locked. 6. The locking piece is deformed to a side away from the toner container by pressing the piece, and the locking protrusion is released from the locking piece. 2. The image forming apparatus according to item 1. A toner container having a container body provided with a discharge port for discharging toner and a shutter mechanism for opening and closing the discharge port, and is attached to and detached from a mounting member provided in the image forming apparatus along a predetermined mounting direction Because
The shutter mechanism is
A support member disposed outside the container body and provided with a communication port communicating with the discharge port;
The toner container is removed from the mounting member, and the discharge port and the communication port are closed, and the toner container is mounted on the mounting member and the discharge port and the communication port are opened. A first shutter member that takes a posture;
In a state in which the toner container is removed from the mounting member, the communication port is covered so as to cover an outer edge of the communication port on the inner side in the mounting direction. And a second shutter member having an exposure posture that exposes the edge on the back side in the mounting direction.

Images